The CZ 455 I purchased earlier this year shoots pretty well. The trigger isn't great and the bolt wasn't overly smooth either. I put a YoDave trigger kit in the rifle which helped the trigger a bit but it's still not great when the adjustable sears are available again I think I'll try one of them with a much lighter spring. I'm not a fan of the safety being backwards from all my other rifles either.
I do like the ability to quickly change barrels, I purchased the combo 455 American and the .17 HMR barrel shoots a good deal better than my .22 barrel. The .17 HMR is very close to being a MOA gun, the .22 is closer to 1.5 which isn't bad but it's nothing to write home about. The stock is pretty good and the bluing is decent. For the money it's not a bad rifle but unless you plan to swap calibers I think a Savage is a better choice.